[php-src] Issue #9829: Bug in refactoring in PHP 8.1.6 Windows shmat() function

Issue: https://github.com/php/php-src/issues/9829 Author: TysonAndre ### Description The following code: See https://github.com/krakjoe/apcu/issues/445 for the original report and https://github.com/php/php-src/pull/8648 - The shmat function will now return something other than -1 if the address wasn't allocated, due to checking an offset of a pointer against null instead of checking the original pointer. That seems likely to be the bug affecting windows users of APCu when certain web servers are used on Windows (I'm not familiar with windows APIs) Resulted in this output: (apcu (in-memory shared cache) suddenly sharing memory between different php processes in php 8.1.6 But I expected this output instead: apcu behavior remains the same as php 8.1.5 ### PHP Version 8.1.6+ ### Operating System Windows